Grease-plug.



c. w. NEWCOMBE.

GREASE PLUG.

APPLICATION FILED DEC-20,1915.

1,187,922, Y atentedJune 20,1916.

Mi Mi kg N 8 {nae/mar C'fiar/es Newoombe Q Attormy sli tteiited June 20,1916;

,sasi

Y the mutton of the bear "thereby given I reciprocating V Vances pistonupon;

its feeding nation. u on herein shown; the integral withthe ire-c111)The up me independent of A thereto by any suitg'particular construction11 the essential-part of my 'phlg 2 is hollow; consti it? shell.Thiswhas' a threaded 20 adapted to engage withi in the cup; 1 Theouter"ma provided with 21 for secure engage t. Qf} place. 1 The exteriorshape of the plug may be made snitnble and desired: At p111 a section 22which perrriit its free the ed Qpening of of the ifiteriof surface ofthe well inward from its inner as to constitute apistons a 7extendihgthroughthe 0fe plug, and provided with uttohFO to limit themovement toward the Open oninner end .1' s bored from its jmltel end'hicl' u weightis free to md'yfe RX? xston. The welght shown 1m has'mcbntral hole 530. v The 01! the ai 1% from one side inwthe Wit-US Qfthe piston. qpen end of the plston 15 the mmith of the piston 1 Thepiston which eentflins the s tightly closed, whereby it 1- the grense'toenter end-t0 g effect upon the reciprm 3 t The pietnn closing plug withexterior flange 40,

which spring acts between hand wliensex ewing the plug withiflthi is apiston.

1 00 plug 4, which has it neck 41f or the reception of the of the plug.

the piston and outer end of the plug to move the piston toward the openinner end In usihgj a device of this kind, the rass cup 1 would befilled with grease to suchan extent as experience shows is needed.

The'plug is then screwed in place. At the time of inserting the plug,the piston would be projected toward the open end of the plug, butwouldnot extend outside of the plug, being stopped by the button 70 upon thestem 7. As the plug is screwed into the cup,'1t begins to compress thegrease.-

The

' pressure thereby produced acts, as the plug is further inserted, toforce the piston back or into the 'positionshown in full lines in Fig.2.x a d The rotary movement given to the bearing; with whichthe plug isassociate produces a reciprocating movement in the hammer or weight5,'thereby forcing the piston downward upon-the grease with a gentleconstant pressure. In consequence of this,

the grease is gently forced through the feed channel 8 to thebearing.The weight of the hammer member 5, and'the length of its reciprocation,together with theintensity of the centrifugal force-produced by therotation of the hearing, may be so proportioned that thefifeeding of thegrease may be constant, and yet without forcing grease out at .the endsof the hearing." In consequence the grease is all used and not wasted.The result is a'great economy inthe use of the-grease. I have foundbypractical tests under working conditions that the amonnt of greaserequired when fed after this manner is but asmall percentage of thatused where the plug is fed by hand. Further, the feedingis constantdurin the operation", ofthe en', ,gine', and,,, there 'ore, the bearingsare kept constantly.

I plubricated so as'to prevent their heating.

In the} construction ofFig. 3 the'twoj parts of the piston arenotscrewed together, but are drawn together by a bolt 8, whichv passesthroughthe central hole in thehammer 5.

opening freely washers 38, of copper or other packing material may beplaced under head and nut of the bolt. '1 have=also shown the outercasing 2 as'provided with a shoulder 23 which acts as a stopto limit theupward movement of the piston.

' What I claim as my lIIVBIltiQil', and desire topatent is: j p --,1.'Apgrease plug bored from its inner end. to form a cylinder, a pistonfitting said cylinder. and bored from its outer .end, a plug closing thebore of the; piston and a weight within the cavity of the piston adaptedto reciprocate axially of the piston.

. 2. A grease plu bored-from its inner end to form a cylin er, a pistonfitting. said cylinderiand bored-from its outer end, a'

plug closing the bore of the'piston, a weight "withinfthe cavity of thepiston'adapted to 'reciprocatexaxially, of the piston, and a v springacting between the outer ends of the piston and the plug to advance thepiston.

3. A grease plug bored from its inner end said bore, an axiallyreciprocable hammer acting upon'th'e piston to move it, and means formaintaining a uniform stroke of the hammer at all positions of the,piston.

.4. .A grease plugbored from itsinner end to form a cylinderOflHllfOI'Ifl bore, a piston fitting said bore'andhavinga closedinterior to form 'a cylinder therein, a piston fitting cavity, and a.hammer within said piston cavity and reciprocable axially therein.

5. A grease plug bored 'to form acylin'der Y t its inner end, a pistonfittin g said cylinder ing through the outerv ,han mer reciprocableaxially of and acting.

uponthe pistonyand means for-maintaining a uniform stroke of said hammerat all positions of the piston.

- 6. -A"tub lar grease plug, a piston the inner end oftheplug and havinga stem projecting fromit spouter end, said piston ha'vin'gaclosedinterior cavity and a weight and having a stem :extend- 1 end ofthe plug, a..

loosein saidcavity, a spring Within the outer end of the plug acting toproject the piston, and a stoponthepiston stem, limiting'the.projection-of'the piston.

Signed at Seattle, Washington, day'oi December, 1915'.

. oHAnLEs'W. NEWCOMBE.

this 9th:

